Browsing Mathemateg a Ffiseg / Mathematics & Physics by Title

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  • Wallis, D.; Burchell, M. J.; Cook, Anthony; Solomon, C. J. (2005-05)
    Planetary impact craters have a high degree of radial symmetry. This hampers efforts to identify the azimuthal impact direction for most craters – the radially symmetric component of an impact crater swamps any asymmetries ...
  • Sjöstrand, J.; Iantchenko, A. (2001-11)
    We consider the problem of constructing a microlocal logarithm and a normal form for an elliptic semi-classical Fourier integral operator near a fixed point of the corresponding canonical transformation. In [Ia] the canonical ...
  • Iantchenko, A.; Sjöstrand, J.; Zworski, M. (2002-03)
    We apply recent results on semi-classical trace formulae and on Birkhoff normal forms for semi-classical Fourier integral operators to a wide range of semi-classical and high energy spectral inverse problems.
  • Avila-Pozos, Orlando; Mishuris, Gennady; Movchan, Alexander (2010-09-01)
    A bi-material waveguide is assumed to have an array of sufficiently long cracks parallel to the boundaries. The Bloch–Floquet waves propagating along such a waveguide are dispersive, and the band gaps are clearly identified. ...
  • John Edward (2005)
    We construct a transformation between Bose Fock space and Fermi Fock space that is super-symmetric in the sense that it converts Boson fields into Fermi fields over a fixed one-particle space h. The transformation the ...
  • Brown, B. Malcolm; Wood, Ian; Marletta, Marco; Naboko, Serguei (2008-03)
    Starting with an adjoint pair of operators, under suitable abstract versions of standard PDE hypotheses, we consider the Weyl M-function of extensions of the operators. The extensions are determined by abstract boundary ...
  • Cox, Simon (2009-05-21)
    Candidates to the least perimeter partition of the surface of a sphere into N planar connected regions are calculated for N ≤ 32. A search procedure based upon random shuffling and combinatorial enumeration is used. It is ...
  • Cox, Simon (2006-09)
    Candidates to the least perimeter partition of a disk into N planar connected regions are calculated for N ≤43. A Voronoi construction is used to randomly create the candidates and then the perimeter of each is found with ...
  • Hill, Joe M.; Lloyd, Noel G.; Pearson, Jane M. (2007)
    We present conditions for the origin to be a centre for a class of cubic systems. Some of the centre conditions are determined by finding complicated invariant functions. We also investigate the coexistence of fine foci ...
  • Wilding, M. C.; Benmore, C. J.; Weber, J. K. R. (2010-01)
    X-ray diffraction data have been collected in situ for a series of magnesium silicate liquids between and including the two mineral compositions enstatite and forsterite (MgSiO3 and Mg2SiO4). The pair distribution functions ...
  • Kargl, Florian; Meyer, A.; Horbach, J.; Kob, W. (2004-07)
    We use inelastic neutron scattering and molecular dynamics simulation to investigate the interplay between the structure and the fast sodium ion diffusion in various sodium silicates. With increasing temperature and ...
  • Simon; L.; P.; Sian; B.; M.; P. (2011-06-01)
    A programme of research is outlined which considers the foaming performance and foam behaviour of surfactant systems commonly encountered in hand-wash laundry detergent applications. An experimental study of the physical ...
  • G. Neville; Martin C.; Quang Vu; Odile; Louis (AIP Publishing, 2009-01-29)
    Small angle x‐ray scattering (SAXS) has been measured in the wavevector range 0.01<Q<1 math−1 for supercooled yttria‐alumina melts using a laser‐heated aerodynamic furnace. SAXS intensity rises gradually with temperature ...
  • Dey, Santanu; Gohm, Rolf (2007-05-01)
    Motivated by a result on weak Markov dilations, we define a notion of characteristic function for ergodic and coisometric row contractions with a one-dimensional invariant subspace for the adjoints. This extends a definition ...
  • Dey, Santanu; Gohm, Rolf (2011-10-31)
    We introduce characteristic functions for certain contractive liftings of row contractions. These are multi-analytic operators which classify the liftings up to unitary equivalence and provide a kind of functional model. ...
  • Langstaff, David; Birkinshaw, K. (2005-12-22)
    A charge detector array for recording signals from a microchannel plate (MCP) in which a synchroniser circuit (14) is provided in respect of each of a plurality of channels, interposed between a respective charge amplifier ...
  • McDonough, Thomas; Shaw, R.; Topalova, S. (2013-01-01)
    We classify all line spreads S21 in PG(5, 2) of a special kind, namely those which are book spreads. We show that up to isomorphism there are precisely nine different kinds of book spreads and describe the automorphism ...
  • Argatov, Ivan; Mishuris, Gennady (2010)
    A three-dimensional unilateral contact problem for articular cartilage layers is considered in the framework of the biphasic cartilage model. The articular cartilages bonded to subchondral bones are modeled as biphasic ...
  • Bromley, Stefan T.; Flikkema, Edwin (2005-10-28)
    Extensive large-scale global optimizations refined by ab initio calculations are used to propose (SiO2)N N = 14–27 ground states. For N <23 clusters are columnar and show N-odd–N-even stability, energetically and electronically. ...
  • Giovannetti, Vittorio; Burgarth, Daniel Klaus; Mancini, Stefano (2009-01-13)
    A chain of interacting spin behaves like a quantum mediator (quantum link), which allows two distant parties that control the ends of the chain to exchange quantum messages. We show that over repeated uses without resetting ...

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